ARRIS S33 Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Modem

In this review of the ARRIS S33 cable modem, the bottom line is simple: this is a strong choice for households that want multi-gigabit wired performance without paying monthly rental fees. The S33 uses DOCSIS 3.1 to deliver multi-Gigabit throughput across a 2.5 Gbps Ethernet port plus a 1 Gbps port, making it well suited for high-speed plans, gamers, and 4K streamers who pair it with their own Wi-Fi router. Setup is straightforward and the unit targets users who want raw speed and reliability rather than a combined modem and wireless gateway.

Key Features

• DOCSIS 3.1: Provides modern multi-Gigabit capability for lower latency and improved throughput compared with older modems.
• Multi-Gig Ports: One 2.5 Gbps Ethernet port plus a 1 Gbps port allow combined speeds and direct wired connections for gaming consoles and wired routers.
• Compatibility: Works with major cable ISPs such as Xfinity, Spectrum, and Cox so it fits most common home internet services.
• Easy Setup: Activation is straightforward with the SURFboard Central app and a plug-and-play approach for pairing with a separate Wi-Fi router.
• Cost Savings: Owning the modem eliminates recurring rental fees, potentially saving up to hundreds per year depending on the provider.
• Trusted Brand: ARRIS hardware is widely used in many homes, conveying familiarity and established support.

Who It's For

The ARRIS S33 is aimed at users who have a high-speed cable plan and want the best possible wired performance: households with heavy streaming, competitive gamers needing low latency, or those running a separate high-end router for whole-home Wi-Fi. It is also a practical pick for anyone wanting to stop paying modem rental fees and take control of their home network hardware.

It is not for people who want an all-in-one device with built-in Wi-Fi, or for very casual users on low-tier plans who do not need multi-gigabit speeds. Buyers who prioritize lower operating temperature or long-term durability concerns from some user reports may want to compare alternate models before deciding.

Pros & Cons

Pros

• Delivers true multi-Gigabit wired speeds with a 2.5 Gbps port for demanding home networks.
• Broad ISP compatibility keeps activation and service simple for most cable providers.
• Easy to set up with the SURFboard Central app and pairs cleanly with a separate Wi-Fi router.

Cons

• Does not include built-in Wi-Fi, so a separate router is required for wireless devices.
• Some customers report the modem runs warm and have had mixed long-term durability, so expect to monitor operating temperature.

Specifications

Our Verdict

The ARRIS S33 is a practical, value-oriented multi-gigabit cable modem for users who need fast wired performance and want to avoid rental fees. It pairs well with a quality router for whole-home Wi-Fi and suits gamers and heavy streamers; just be aware it has no built-in wireless and some users report heat and durability concerns. Overall, it delivers modern DOCSIS 3.1 speeds at a reasonable cost for owners who prioritize throughput and control.

Frequently Asked Questions

Does this modem include Wi-Fi?
No. The S33 is a modem-only device and must be connected to your own Wi-Fi router for wireless coverage.

Will it work with my cable provider?
The S33 is compatible with major cable ISPs such as Xfinity, Spectrum, and Cox, but check your provider's approved modem list before purchase.

Can it deliver multi-gig speeds?
Yes. With a 2.5 Gbps Ethernet port plus a 1 Gbps port it supports multi-gigabit wired connections suitable for high-speed plans.